Brother HL-4150CDN - Poor Fixing

2-98
Confidential
■ Poor fixing
<User Check>
- Check if the scanner window of the laser unit is dirty.
(Refer to Fig. 2-12 (P2-95))
- Use the specified paper.
- Open and close the front cover and make print again.
- Adjust the color calibration from the control panel.
- Adjust the auto registration from the control panel.
- Check the printer’s environment. High temperature and high humidity or
low temperature and low humidity conditions can cause this problem.
- Replace the belt unit with a new one.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Memo
You can check this image defect with the function code 71.
(Refer to “1.4.17 Color test pattern (Function code 71)” in Chapter 5.)
Step Cause Remedy
1 Fuser unit failure Replace the fuser unit.
2 Low-voltage power supply
PCB failure
Replace the low-voltage power supply PCB
ASSY.
3 High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
4 Engine PCB failure Replace the engine PCB ASSY.
5 Laser unit failure Replace the laser unit.
6 Toner/New sensor PCB
failure
Replace the Toner/New sensor PCB ASSY.
7 Main PCB failure Replace the main PCB ASSY.